Coffee-machine.



G. NELSON.

COFFEE MACHINE.

APPLIOATION FILED MAY 3,1907.

938,605, Patented Nov.2, 1909.

WitnessW Z 1112112 A ttomeys I subject of the King the borough of Brooklyn, county of Kings,

UNITED STATES PATENT oFF cE.

CHARLES NELSOIL OF BROOKLYN, NEW YORK, ASSIGNOB TO S. STEENAU '& 00., OF NEW YORK, N. Y., A GOPABTNEBSHIP.

COFFEE-Cm.

To all whom it may concert: v

Be it known that I, Gums NELSON, a of Sweden, residing in and State of New York, have invented an Improvement in Coffee-Machines, (Case E,)

of which the following is aspecification.

The object I have in View is the production of a machine for making coffee or an infusion from coffee, tea or other materials for the production of a beverage or for other analogous or different purposes, which machine will have advantages over others heretofore produced.

' The particular advantages I seek to secure I are to produce a. machine which will initiate coming In carrying a percolating action in a very short time after heat has been applied, and before the water in the receptacle has been raised appreciably in term erature.

Other objects 'e in the production of a device which may be readil cleaned, and which will be cheap to mauu acture.

I obtain these objects by the mechanism illustrated in the accompanying drawings, in .Whi h- Figure 1 is a longitudinal section of a. coffee machine embodying my invention. Fig. 2 is an enlarged sectional view of the lower portion of the percolator. Fig. 3 is a lan view of the lower portion of the perco ator with the valve removed, and Fig. 4

w is a perspective view of the valve.

In all of the views, like parts are designated by the same reference characters.

out my invention 1 provide a or containing the water or in- Above the receptacle 1 fusion after the latter is made.

receptacle is a globe 2 usually made of glass. Between the receptacle and globe is a screen.

3 for containing the coffee, tea or other substance of which the infusion is to be made. This screen is rovided with a'central tube t which exten up into the globe 2. The purpose of this tube 4 is to prevent the coffee or other substance inthe screen from in contact with any portion of the percolator. Y

The bottom of the receptacle 1 is provided with a recess 5, which is centrally disposed and is referably circular in plan. At the bottom 0 the recess 5 is a late 6, which is adapted to extend over su cient area to prevent the heat of the flame from the lamp or other source of heat from coming in d1- Specification of Letters Patent.

Application filed lay a, 1907. Serial no. 371,582.

Patented Nov. 2 1909.

rect contact with the bottom of the meet tacle. This plate also serves to convect the. heat to the recess 5. The upper portion of 'the recess 5 communicates with the interior of the receptacle 1.

The percolator is adapted to rest within the recess 5, and to extend upward through the central tube 4. As illustrated the per colator comprises a vertical tube 7 open at the upper end and connected at its lower end with the upper portion of a valve cham-v ber 8. This valve chamber is preferably made in two parts, the cover 9 being permanently secured to the lower end of the tube 7, and screwed or otherwise temporarily secured to' the body 10. The body 10 is provided with inclined sides 11, below which is a reduced portion 12 with vertical sides. Above the inclined sides 11 is an enlarged portion with vertical sides. The enlarged portion is provided with screw threads which engage with similar threads on thecover 9 and serve as a means for securing the two parts together. By separating the two parts the inside of the valve chamber may be reached for the purpose of cleansing it.

The valve chamber is connected to 'an air chamber 13, which is provided with vertical sides of such a size as to snugly fit within the recess 5. An overhanging flange 14 on the edge of the air chamber improves the tightness of the joint between the chamber and the recess. The bottom 15 of the air chamber is dished as shown, so that when it rests upon the bottom of the recess 5 a cavity will be formed between the two. The reduced portion 12 of the valve chamber extions 16. These per orations are best made of a shape shown in Fig. 3. A valve 17 lies withinthe valve chamber and is adapted to close the perforations 16. The valve 17 is provided with a dished body 18, and a. hollow stem 19. The hollow-stem 19 is -pro- A vided with a slot or'slots 20, which best extend throughout the length of the stem.

These slots serve as ameans' of communication between the inside of the receptacle 1 produced.

and the valve chamber, when the valve is lifted from its seat.

The stem of the valve is adapted to engage with the reduced portion 12 of the the valve body so that the valve will be guided at this point. By making'the valve of the shape described it. is impowibl'e for it to fail to seat itself, under all circumstances. The usual deflector 21-is attached to the central tube 4, and lies in a position above the upper open end of the vertical tube-7.

The operationof the invention is'as follows: Ground coffee or other substance of which the infusion is to be ma e is placed within the screen 3, and water introduced within the receptacle 1. This water will enter the inside of the valvebody through the perforations 16, pressure of the water rais ing the valve to permit this to be done, the passage being through the slots 20 in the stem. The water will fill the cavity below the bottom of the air chamber and will rise up in the vertical tube 7 to the height of the water within the receptacle 1 or slightly.

higher owing to capillary action. Heat is now applied to the bottom of the receptacle 1 and plate 6. When the water within the .cavity belowthe air chamber begins to boil the pressure of the steam will force the water up through the stem 7'causing it to strike against the deflector and be spattered over the contents of the screen, whereupon it will seep through the contents back into the receptacle forming the infusion. As soon as the pressure is relieved by the discharge of the liquid through the tube 7 the equilibrium will be atablished by the introduction of fresh liquid from the inside of the receptacle into the valve chamber, the valve rising for purpose and opening the perforations 16. The operation will 'be repeated, the valve intermittently opening and closing. This will continue until an infusion of the desired strengthhas been The air chamber 13 is important as it isolates the heat and prevents the contents of the receptacle 1 raised in By making the bottom of-the chamber dished as shown, a cavity of the smalltst size practicable is produced, and one of such a shape that steam is readily generated is secured.

In accordance with the provisions of the patent statutes, I have described the principle of my invention, together with the apparatus which I now consider torepresent upper end, the casing the best embodiment thereof; but I desire to have it understood that the apparatus shown is merely illustrative and that the invention canbecarriedoutinotherwa 5.

Having now particularly escribed the nature of my invention, and in what manner the same is to be performed, what I claim and desire to secure by Letters Patent is:

1. A coffee machine, having a receptacle, a small heating chamber in communication therewith, and a percolator, said percolator a tube and a valve chamber, said valve chamber communicating directly with the heating chamber and having inclined sides with o the said inchned sides being perforated',,in combination with a valve having a dished body and a hollow slotted stem, the body engaging with the inclined sides and the stem ying within the reduced portion.

'2. A coffee machine, having a receptacle, a heating chamber communicating therewith, and a percolator, the said percolator having a tube and a valve chamber, said valve chamber having a cover permanently connected to the tube, and a body with inclined sides with openings and. a reduced portion, said body being removabl connected to the cover, and a valve, sai valve having a. dished body anda hollow slotted stem, said body with the inclined sides and the stem lying 3. A fountain foria'cofiee machine having an outlet tube communicating with a casing, a cover for the casing, the said casing an insulating chamber at its lower end and having a portion at its above tlon removably secured to the cover, the said aring portion having portsaznd a valve adapted to close the the said valve ha a slotted hollorf'stem in engagement with the 4. A fountain fora coffee machine having an oulet tube communicating with areasing, a. cover for the casing, the said carryinganairchamberatitslowerendan having a flaring portion at its upper end, the casing above the flaring portion removably secured to the cover, the sai flaring portion having ports and a valve and a reduced portion,

within the reduced portion.

adapted to close the ports, the said valve havmg with the casing.

This specification signed and witnessed this 26th day of April, 1907.

7 CHARLES NELSON.

Witneses:

Lnonm H. Dm, Jorm S. Lumen.

a slotted hollow stem in engagement 

